Improve operational UX, recovery flows, and action safety

Implement the approved UX review across Fleet, Betas, Library, deployments, and Settings. Add reviewed promotion and reconciliation plans, atomic queued-removal cancellation, recoverable beta drafts and launch inputs, accessible controls, and mobile improvements.

Validated with 473 tests, a clean typecheck, production build, and isolated desktop/mobile browser walkthroughs. Include the review and implementation coverage notes.

src/lib/ui/status.ts

@@ -8,7 +8,7 @@ const states: Record<string, [string, StatusTone]> = {
     'awaiting-health': ['Verifying health', 'info'], 'awaiting-match': ['Waiting for a match', 'neutral'],
     ready: ['Ready', 'online'], 'ready-promote': ['Ready to promote', 'online'],
     done: ['Completed', 'online'], passed: ['Test passed', 'online'], tested: ['Test passed', 'online'],
-    promoted: ['Promoted', 'online'], 'rolled-back': ['Rolled back', 'neutral'],
+    promoted: ['Promoted', 'online'], 'rolled-back': ['Rolled back', 'neutral'], cancelled: ['Cancelled', 'neutral'],
     failed: ['Failed', 'danger'], 'test-failed': ['Test failed', 'danger'], interrupted: ['Interrupted', 'danger'],
     warning: ['Completed with warnings', 'warning'], held: ['Held by beta', 'neutral'],
     manual: ['Manual action needed', 'warning'], paused: ['Paused', 'warning'], inconclusive: ['Missing evidence', 'warning'],